50 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



KEY TO THE SPECIES AND SUBSPECIES OF CENTURUS. 



a. Rump and upper tail-coverts without red. 



b. Rump and upper tail-coverts white, with or without black bars or other markings, 

 c. Hindneck red, orange, or yellow. 

 d. Abdomen red or pink. 



e. Prefrontal region red or pink; larger (wing 122-157.5 mm.). 

 /. Middle rectrices with much white; inner webs of primaries with large 

 spots or blotches of white on proximal half. 

 g. Forehead light red (male) or gray (female); upper tail-coverts not dis- 

 tinctly, if at all, barred; abdomen pale red. (Eastern United States.) 



Centurus carolinus (p. 55). 

 gg. Forehead white, or, sometimes, pale brownish gray (both sexes); 

 upper tail-coverts conspicuously barred with black. 

 h. A conspicuous superciliary spot of black (females with black on 

 occiput also). 

 i. Black superciliary spot larger; under parts more yellowish; size 

 larger (wing averaging more than 138, tail more than 94, culmen 

 more than 38 in males, wing averaging more than 135, tail more 

 than 92, culmen more than 34, in females). {Centurus 

 super ciliaris.) 

 j. Larger (averaging: wing 147.3, tail 99.5, culmen 39.8, tarsus 

 25.9, outer anterior toe 22.6, in male; 144.5, 98.7, 35.5, 25.1, 

 21.7 in female); general color of under parts darker and more 

 yellowish. (Cuba, except Isle of Pines.) 



Centurus superciliaris superciliaris (p. 59). 



jj. Smaller (averaging: wing 138.4, tail 94.5, culmen 38.2, tarsus 



24.4, outer anterior toe 20.8, in male; 135.5, 92.5, 34.5, 24.5, 



19.8 in female); general color of under parts paler and less 



yellowish. (Isle of Pines, Cuba.) 



Centurus superciliaris murceus (p. 61). 



ii. Black superciliary spot smaller; luider parts more grayish; 



smaller (wing averaging less than 134, tail less than 92, culmen 



less than 33, in males; wing averaging less than 130, tail less 



than 92, culmen less than 29, in females). (Centurus hlakei.) 



j. WTiite bars of dorsal region and general color of under parts less 



strongly tinged with yellowish; forehead more purely white 



in male, dull white in female. (Island of Abaco, Bahamas.) 



Centurus blakei blakei (p. 61). 



jj. White bars on dorsal region and general color of under parts 



more strongly tinged with yellowish; forehead duller white 



in male, pale smoky brownish in female. (Great Bahama 



Island, Bahamas.) Centurus blakei bahamensis (p. 63). 



hh. No superciliary spot of black; females with little if any black on 

 occiput. 

 i. Black bars on upper parts much broader, the white areas less 

 strongly tinged with yellowish, this mostly on back; a few 

 small streaks of black on supra-postocular region; adult male 

 averaging: wing 129.5, tail 88.9, culmen 32.9, tarsus 23.1, outer 

 anterior toe 20; adult female averaging: wing 129.3, tail 91.3, 

 culmen 28.2, tarsus 21.7, outer anterior toe 18.2. (Watling 

 Island, Bahamas.) Centurus nyeanus (p. 63). 



